Breast of plow



. July z, 1957 sHlNJlRo TAKAKITA ETAL 2,797,630

BREAST oF PLow Filed NOV. 26, 1954 l I 9/6 l I Flai 0; Q

' if Flaa 2 Sheets-Sheet 1 I6 INVENTORS Shinjro Takakito '7 ,shoichiTuknkim Minoru Takakifo Tsuomu Tokakito Akira Tokokto ATTORNEYS July 2,1957 sHlNJlRo TAKAKITA x-:TAL l 2,797,630

BREAST oF PLow Filed Nov. 2e, 1954 2 sheets-sneer 2 FIG. 9

55* l 32' INVENToRs Shnjiro Tckakiio Shoich Takokifu Minoru TokokiaTsuomu Tclkoki'ru Akira Takokircl ATTORNEYS are BREAST F PLOW ShnjiroTalialrita, Shoichi Talralrita, Minoru Takalrita, Tsutomu Tairaisita,and Akira ".lfairaltita, Nabari-cho, Nakagun, Meken, Japan ApplicationNovember 26, 1954, Serial No. 471,472

3 Claims. (Cl. QTL-123) This invention relates to plotvs and morespecifically to the moulldboards or, as they are sometimes designated,the breasts thereof. The invention is of the class of plows disclosed inour copending application Serial No. 304,662, tiled August l5, 1952.

An important object of the present invention is to provide a ribbedmouldboard having spaced-apart ilangeless ribs which are substantiallydat in transverse section at their lower end portions and curved intransverse section at their upper end portions to provide an especiallyeffective ribbed mouldboard with the ribs thereof of more simpleconstruction than -those disclosed in our copending application referredto above.

Another important object is to provide a ribbed mouldboard comprisingspaced-apart ilexible metallic ribs, capable of angular adjustment sothat the mouldboard may be warped as a whole and the ribs assume steppedpositions at their upper portions, and which ribs are manipulated byangularity adjusting means of simple construction, dilfering from themeans, disclosed in our aforesaid copending application, for angularadjustment of the ribs of that application.

A further important object is to provide a mouldboard as described whichcauses soil, dislodged by the plowshare to move upwardly along themouldrboard and not simply fan therefrom along the lower longitudinaledges of the mouldboard.

Additionally, an important object is to provide a mouldboard asdetailed, in which the upper end portions of the ribs will increase,when properly manipulated, in angularity relative to the lower portionsthereof so that there will be provided a stepped upper assembly oftransversely curved ribs to cause effective breaking up of the clodstravelling up the mouldboard with the loose soil and the resultantmaterial will not scatter but will be turned over and deposited in 'themost effective manner for desirable plowing results.

Other objects and advantages of the invention will be apparent duringthe course of the following detailed description of the invention, takenin connection with the accompanying drawings, forming a portion of thisdisclosure and in which drawings:

Fig. l is a bottom plan of one form of the mould'board.

Fig. 2 is a vertical longitudinal section thereof, substantially on theline A-B of Fig. 1.

Fig. 3 is a transverse section of the lower portion of one of thesimilar ribs of the mouldboard, substantially on the line C--D of Fig.l.

Fig. 4 is a transverse section of the rib referred to above,substantially on the line E-F of Fig. l.

Fig. 5 is a bottom plan of a second form of the mouldboard.

Fig. 6 is a vertical longitudinal section thereof, substantially on theline G-H of Fig. 5.

Fig. 7 is a side view of a plow frame upon which the mouldboard of Figs.1 4 is mounted.

Fig. 8 is a top plan of the showing in Fig. 7 but with the frame partlyin horizontal section.

Patent 1 2,797,630 Patented July 2, 19757 ice Fig. 9 is a perspectiveView of the mouldboard of Figs. 1-4, 7 and 8 attached to a plow frame,shown mostly in horizontal section.

In the drawings, wherein for the purpose of illustration are shown twoforms of the invention, the mouldboard orv breast A' includes aplurality of elongated, spaced-.apart ribs 3 of springy preferablymetallic material, as steel, each rib having a substantially fiatsurface or outer face at its lower portion 1 merging into a curvedsurface, being outwardly transversely curved, at the upper portion 2,with the curvature shown by way of example in Fig. 4. The ribs areclosely spaced apart. Each `rib 3 is provided with first mounting meansat its lower end for movable attachment of the rib to a plowshare 24 byway of a plate 5 secured to the plowshare and having a rearwardlyprojecting end ange 6 substantially normal to the share body. The meansis shown as a relatively broad hook 4 (for example, of a widthsubstantially one-half the width of the rib), preferably of J-shape inlongitudinal section, which is firmly secured to the rib, in anyapproved manner, as by welding. The hook 4 projects beyond the end ofthe rib and is adapted to hook into one of a plural-ity of spaced-apartslots 7 carried by the flange 6. The hook 4 has a slightly loose lit inits slot 7 and the hook provides a hinge with its pivotal axissubstantially paralleling the upper edge of the plowshare so that therib 3 may freely rise and fall tota limited extent. At its upper end,each rib is provided with a rearwardly-extending ange 8 lixedly supporting a lug or projection 9 adapted to have a sliding lit in any oneof a plurality of spaced-apart openings 1l in an elongated plate. lil,which plate is provided with an elongated slot 10,. Means to detachablysecure the lugs 9 .against accidental removal from `their associatedopenings 11 in the plate 10, may be cotterpins 12 extending throughsuitable openings in the free end portions of the lugs. p

The slot 10 is adapted to receive the billY portion of a hook 13 mountedupon the upwardly-extending portion or post of the plow frame 23, as bythe bracket 36.

Means for manipulating or operating the mouldboard is preferablysubstantially similar to that disclosed in our copending applicationreferred to above and comprise an elongated handle 25 extending along,but spaced from, the post of the frame 23 and limited in movement at itsupper end portion 25 by a bracket 30 carried by the post and providedWith a slot (shown in Fig. 8) through which the end portion 25 looselyextends. An inwardly-extending projection 31, extending transverselyinto the slot, provides two shoulders 32 and 32' for selective abutmentof the portion 25 thereagainst, with spaces between the shoulder-s andthe end walls of the slot. Additionally, there is an intermediate space34 between the projection 31 and the facing side wall of the slot toaccommodate the end portion 25 so the latter may be slid along thisspace 34 or may abut the projection 31. The lower end portion of thehandle 25 extends substantially normal to the upper end portion thereofthrough a suitable bore in the base of lthe frame 23, and is provided,at its free end, with means for attachment to the ange 6. The means maycomprise a lug 27 secured to the plate 5 to extend substantiallyvertically downwardly and provided with an opening to receive thescrew-threaded free end of lower end portion of the handle 25 to projectforwardly therefrom and receive a suitable nut 29. It is preferred thatthe sole 22 attached to the base of the frame 23 be provided with anupwardly-extending projection 28 having an opening to receive a part ofthe free end of the lower portion of the handle 2S and disposed betweenthe lug 27 and base of the frame. The sole 22 is provided with aforwardly-extending stub 3S to receive the under portion 24' of theshare 24. Oscillation of the handle 25 will os'cillalte the share withconsequent movement of the mouldboard,

The mouldboard B of Figs. and 6 and its association with a plow andplowshare differ from the mouldboard A only inthe rst mounting means formovably attaching the lower portions of the ribs 18 to the plowshare, byway of a plate 14, somewhat like the plate 5, attached to the plowshare.The plate 14 has a ange 16 somewhat like the flange 6 but is alsoprovided with a downturned portion 17 extending from the flange 16 andsubstantially paralleling the body of the plate 14. This body isprovided with a nut-accommodating opening 19, larger in diameter than`the outer diameter of a nut to be described, and the portion 17 isprovided with a bolt shank-accommodating opening 19 and the axis of thetwo openings 19 and 19 being coincident. To the rearward side of thelower portion of each rib 18 is xedly secured, as by conventionalwelding, a nut 20 which extends freely in the opening 19 with up-anddownplay and, through the opening 19 freely extends.

the shank 21 of a bolt with the screw-threaded end portion of the shankretained by the nut and the head 21' outwardly of the portion 17 andbeing of greater diameter than that of the opening 19 whereby the n'b 18and portion 17 are detachably secured together. In eiect, theconstruction disclosed provides a hinge, functioning as does the hingejust mentioned.

The ribs of our mouldboards do not rotate as a whole. They are adaptedto warp or twist particularly at their upper end portions while theouter surfaces of their lower portions will remain in nearly the sameplane, with the warp or twist very slight. As a result, the soil whichis penetrated and plowed up by the share 24 and deposited upon the lowerportions of the ribs will travel up the ribs and be broken up, turnedand dropped by the upper portions of the ribs when transversely warpedand disposed in stepped relation.

Various changes may be made to the -forms of the invention herein shownand described without departing from the spirit of the invention orscope of the claims.

What is claimed is:

1. In combination with a plow frame, an upwardlyextending plowsharepivotally mounted upon a lower portion of said plow frame, and Ameansfor manually rotating said plowshare, a mouldboard` comprising aplurality of spaced-apart upwardly-extending ribs of exible material,normally disposed in substantial parallelism, first mounting means foreach rib movably mounting said ribs at their lower portions upon saidplowshare to extend upwardly and away therefrom and move in unison withrotative movements of said plowshare, and second mounting means formounting the upper portions of said ribs upon said plow frame to warptransversely in unison upon movement of said lower portions and to bedisposed in stepped relation, one upper portion with respect to the nextadjacent upper portion, comprising a lug extending from each of saidupper portions, an elongated plate provided with a plurality ofspaced-apart openings to receive each lug and an elongated slot, andsaid second mounting means also including means to detachably securesaid lugs to said plate, and a member having a portionl extending intosaid slot for sliding movement along said slot and having anotherportion xedly secured to said frame.

2. The combination according to claim 1 characterized in that the firstmounting means comprises a broad hook rigidly secured to and projectingoutwardly from the lower face of the lower end of each lower portion anda rearwardly and downwardly extending flange carried by said'plowshare,forming substantially a right-angle with said plowshare, and providedwith a plurality of spaced-apart slots receiving the hooks for swingingmovement in said slots.

3. The combination according to claim l characterized in that the rstmounting means comprises an elongated member detachably secured to thelower end of said lower portion and provided with a head at its outerend, and a'ange carried by said plow-share and provided with a pluralityof spacedpart openings to freely receive the members, each opening beingof less diameter than any of said heads, said ange being disposedbetween said heads and rib.

References Cited in the le of this patent UNITED STATES PATENTS 17,547Akins June 16, 1857 566,218 Oyler Aug. 18, 1896 649,808 Brystrom May l5,1900 841,390 Gullickson Jan. 15, 1907 1,210,249 Yamaguchi Dec. 26, 1916

